Refrigerant leakage protection control method for multi-split air conditioners

A protection control and air conditioner technology, which is applied in the direction of control input involving air characteristics, space heating and ventilation control input, heating and ventilation control system, etc., which can solve the problem of increased unit maintenance costs, leakage of other modules of refrigerant, failure to operate normally Work and other issues, to avoid increased maintenance costs, reasonable process, and improve application performance

Inactive Publication Date: 2015-02-25

NANJING TICA AIR CONDITIONING CO LTD

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Problems solved by technology

Once a certain module leaks refrigerant, it will cause other modules to fail to work normally due to refri...

Abstract

The invention relates to a refrigerant leakage protection control method for multi-split air conditioners. The refrigerant leakage protection control method mainly includes detecting refrigerant leakage conditions and cutting off or restoring electromagnetic valves on corresponding modules and a public refrigerant pipeline according to detection results. The control method is reasonable in procedure, simple to operate and capable of controlling refrigerant leakage of the multi-split air conditioners effectively, so that increase of maintenance costs due to leakage of substantial refrigerants is avoided, normal operation of units with leakage can be kept, and application performance of the overall units is improved.

Application Domain

Mechanical apparatusSpace heating and ventilation safety systems +3

Technology Topic

RefrigerantEngineering +1

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[0021] The present invention will be further described below in conjunction with the drawings and embodiments.

[0022] As shown in the figure, the multi-unit air conditioner includes multiple modules with the same structure and function. Each module is connected to the public transmission pipeline through the solenoid valve 3. A refrigerant leakage detection sensor 1 is installed in each module, and the sensor is connected to the controller 2 in the module. Relevant control parameters such as detection frequency T1, refrigerant leakage amount P, leakage duration T, and repeated leakage times N are preset in the controller. The control method of the present invention includes the following steps:

[0023] a. After the machine is running, each module will self-check whether there is refrigerant leakage at the detection frequency T1;

[0024] b. If a module is detected to be leaking, close the solenoid valve that connects the module with the public pipeline;

[0025] c. The above modules continue to detect, if the leakage disappears, the solenoid valve will automatically resume work;

[0026] d. If the above steps b and c repeatedly occur in the same module when the number of actions reaches N, the solenoid valve must be manually restored.

[0027] Among them, in step b, when the detected refrigerant leakage reaches P, the detection signal is transmitted to the controller, and when the refrigerant leakage reaches T for a duration of P, the controller issues an instruction to cut off the solenoid valve of the module . In step c, if the detected refrigerant leakage is less than P, it is determined that the leakage has disappeared.

[0028] Preferably, the values of the above-mentioned related parameters are: T1 is 1-5 seconds, N is 2-5 times, P is 3-5 g/year, and T is 2-8 seconds.

[0029] The parts not involved in the present invention are the same as the prior art or can be implemented by the prior art.

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Classification and recommendation of technical efficacy words

Easy to operate
Reasonable process

Refrigerant leakage protection control method for multi-split air conditioners

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

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Description & Claims & Application Information

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